(June 30) Today we're celebrating . . .  Leap Second Adjustment Time

06302007t.jpgLeap Second Adjustment Time
A leap second can be added, or subtracted, twice a year to keep time in sync with the atomic clock time.

The second is added, or subtracted, at midnight on June 30th and January 31st.

Although a…leap second is “added” at midnight, its effect actually slows down the atomic clock by one second…since a…leap second represents an extra second that must be counted before the new day can begin.



One Response to “(June 30) Today we're celebrating . . .  Leap Second Adjustment Time”

  1. Alex Says:

    Hi, i was looking for a good picture for the end of the year when i felt on this excellent explanation of a leap second. Unfortunately with the picture shown above we are not leaping 1 second but 2 seconds. Shouldn’t it 12:59:60 instead of 12:59:61

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